AS Greta Kleinhans looked over the Glasshouse Mountains from a cafe at Mary Cairncross Scenic Reserve, she snapped the scene.

Greta, of Mooloolah, took the picture with her mobile phone but it was not until later she realised an unusual object in the foreground. "I didn't notice anything in the sky when I took the photo - no balloons, skydivers, planes, nothing," she said.

Beyond sightings, Mrs Rodwell said she spoke to people who recalled abduction experiences and families who told about aliens interacting with their children in their homes.

"I have had little kids, five-year-olds, talk to me about going through walls and they tell me they like going up on the craft because they learn more (there) than they do going to school.

"People of all ages have told me they have had the experience of being taken through solid walls on the way to the craft and it's like their molecules changed."A little kid of four told me he didn't mind little black aliens coming to play with him because they were quite friendly and their skin felt like 'dolphin skin'.

"This little eight-year-old told me that once a year he goes up with a couple of his school friends to a craft and they have their annual medical exam by aliens."

Mrs Rodwell said she had heard many people recount the notorious "probing experience" by aliens on UFOs.

"People have said a range of things happen on the craft from having DNA samples taken to having genetic samples taken including ova and sperm.

"People who have had serious illnesses have also reported healing experiences and found after an encounter their condition has disappeared."

After hearing of sightings or encounters from police, doctors, solicitors, psychologists, pilots and psychiatrists, Mrs Rodwell said this credible evidence, plus the fact 12 countries world-wide had released their UFO files, amounted to a mountain of evidence.

"Quite often the witnesses are highly credible and they inform people not because they want the exposure, they just want to say isn't this incredible."

Based on her research and counselling, Mrs Rodwell said sightings and abduction experiences were linked in a lot of cases.

"Sometimes with a sighting may come a missing time episode or a feeling that something may have happened that they cannot recall."